fix tmp dirs

tests/plugin.test.ts

@@ -1,5 +1,6 @@
 import { afterEach, expect, test } from "bun:test";
 import { chmod, mkdir, mkdtemp, rm, symlink, writeFile } from "node:fs/promises";
+import { tmpdir } from "node:os";
 import { join } from "node:path";
 import { Agent, Model, Plugin, Provider } from "@opencode/plugin";
 import type { AgentEditor } from "@opencode/plugin/promise/agent";
@@ -418,9 +419,9 @@ test("coordinator inherits only codegraph MCP permissions when that server exist
 
 test("playwright MCP prefers direct MCP, uses npx for Playwright, and preserves fallback behavior", async () => {
     const originalPath = process.env.PATH;
-    process.env.PATH = "";
-    const root = await mkdtemp("/tmp/opencode/stanp-playwright-");
+    const root = await mkdtemp(join(tmpdir(), "stanp-playwright-"));
     try {
+        process.env.PATH = "";
         const packageRoot = join(root, "local", "node_modules", "@playwright", "mcp");
         const executable = join(packageRoot, "cli.js");
         const localProject = join(root, "local", "project");